I am trying to create a chrome extension, but for some reasons, sometimes, the chrome.runtime object seems incomplete, and a lot of methods are missing (including onMessage, which is the one I want).
It seems sometimes it works, sometimes not. I assumed it may be a time related issue, but I don't understand why I can't simply create a message listener on background?
My background script:
setTimeout(function () {
console.log("gogo!");
chrome.runtime.onMessage.addListener(
function(request, sender, sendResponse) {
console.log(sender.tab ?
"from a content script:" + sender.tab.url :
"from the extension");
if (request.type == "tab") {
console.log("tab!");
sendResponse({status: "ok"});
}
}),
2
});
Where "chrome.runtime.onMessage" is undefined.
Thanks!
Edit2: I have built a much simpler prototype, and it's failing again. Now I am really confused. Here is what I have:
$tree
.
├── manifest.json
├── src
│ ├── background.html
│ ├── background.js
│ └── test.js
└── vendor
└── jquery.js
2 directories, 5 files
manifest.json file:
{
"manifest_version": 2,
"name": "test",
"description": "test",
"version": "1.0",
"author": "test",
"homepage_url": "http://www.test.com",
"content_scripts": [
{
"run_at" : "document_idle",
"matches": ["https://www.google*"],
"js": ["vendor/jquery.js", "src/test.js"]
}
],
"background": {
"page": "src/background.html",
"persistent": false
},
"permissions": [
"tabs",
"https://www.google*"
]
}
background.html file:
<script src="../vendor/jquery.js"></script>
<script src="background.js"></script>
background.js file:
function run () {
console.log("gogo!");
chrome.runtime.onMessage.addListener(
function(request, sender, sendResponse) {
console.log(sender.tab ?
"from a content script:" + sender.tab.url :
"from the extension");
if (request.type == "tab") {
console.log("tab!");
sendResponse({status: "ok"});
}
});
}
run();
test.js file:
'use strict';
run();
function run() {
var url = window.location.href;
// Error if no URI
if (!url) {
return 1;
}
var uriRe = /https:\/\/www\.google.*/;
var reParse = uriRe.exec(url);
if (!reParse) {
return 2;
}
chrome.runtime.sendMessage({type: "tab"}, function(response) {
console.log(response);
});
}
I am using Chrome 49.0.2623.112 (64-bit) on OSX.
Edit: Here is a screenshot of what happens the times it fails:
I want to precise again that it doesn't fail all the time (maybe 50% of the time?), which makes it even more weird and makes me believe there is a kind of "race" condition somewhere I am not aware of.
